Interesting. Are you suggesting this because you think doing something physical/tangible would be therapeutic and help me have more meaningful relationships with local community ?
You say you can't be caged into a corporate job, and if you already founded something, you know you can be self motivated for projects you find interesting.
The following is just my personal opinion on level of stress but also 60-70 hours a week is way too much, in general. I can get more done in a focused 40 hour work week without burning myself out. Leaving enough time for other activities and hobbies.